I used to use an GeForce 6800 XTreme from XFX. It's PCI express and 512 DDR3 with SLI capability. However, after a bad electrical surge that ended up with me replacing most of the parts in my PC it doesn't seem to work anymore. When I put it on the motherboard its green light for power comes on and its fan spins, but when I try to hook it up to my monitor it doesn't seem to send anything. I'd really like to know if there's anything I can do for it, because I replaced with some gig ddr2 card that's nowhere near as good.